Abstract
In the Sudan, inoculation experiments were done on a wide range of Egyptian cotton lines homozygous for single genes and for digenic and trigenic combinations of Knight's B genes for resistance to bacterial blight. Although leaf inoculation was successful, stem inoculation was only partially so and boll inoculation, using two different techniques, failed to produce measurable disease symptoms. There was a good general relationship between leaf and stem resistance, and a close association between resistance to natural attack in the field and leaf resistance to artificial inoculation. Confirmation was obtained of the strong resistance conferred by B2B9K, which was as effective as B2B6 or B2B3B6. No other combination was as effective when inoculated artificially. Nevertheless, in a natural field attack, only mild symptoms were found in lines homozygous for B1B9K, and for B4B6. Under the same conditions lines with B2B6 showed no symptoms but those with B2B3 were severely attacked. Reasons for continuing to use major genes in the breeding of blight-resistant cotton in the Sudan are discussed.
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Claims 10
Claim · model-written summary
Leaf inoculation of cotton lines with the blight pathogen was successful.
- Taxon
- cotton
Gossypium hirsutume0 - Organ / stage
- leafe1
- Outcome
- leaf inoculation was successfule1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation experiments were done on a wide range of Egyptian cotton lines”
e1“Although leaf inoculation was successful”
Claim · model-written summary
Stem inoculation of cotton lines was only partially successful.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- steme1
- Outcome
- stem inoculation was only partially soe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation experiments were done on a wide range of Egyptian cotton lines”
e1“stem inoculation was only partially so”
Claim · model-written summary
Boll inoculation with two techniques failed to produce measurable disease symptoms.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- bolle1
- Outcome
- failed to produce measurable disease symptomse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation experiments were done on a wide range of Egyptian cotton lines”
e1“boll inoculation, using two different techniques, failed to produce measurable disease symptoms”
Claim · model-written summary
Leaf resistance and stem resistance to bacterial blight were generally well related.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- leaf and steme1
- Outcome
- resistancee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation experiments were done on a wide range of Egyptian cotton lines”
e1“There was a good general relationship between leaf and stem resistance”
Claim · model-written summary
Resistance to natural field attack was closely associated with leaf resistance to artificial inoculation.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- leafe1
- Outcome
- resistance to natural attack in the fielde1
- Setting
- fielde1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation experiments were done on a wide range of Egyptian cotton lines”
e1“a close association between resistance to natural attack in the field and leaf resistance to artificial inoculation”
Claim · model-written summary
Strong resistance conferred by B2B9K was confirmed, as effective as B2B6 or B2B3B6.
- Taxon
- cottonGossypium hirsutume0
- Gene
- B2B9Ke1
- Outcome
- strong resistancee1
- Qualifier
- as effective as B2B6 or B2B3B6e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation experiments were done on a wide range of Egyptian cotton lines”
e1“Confirmation was obtained of the strong resistance conferred by B2B9K, which was as effective as B2B6 or B2B3B6”
Claim · model-written summary
No other B-gene combination was as effective when inoculated artificially.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- effectivee1
- Qualifier
- when inoculated artificiallye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation experiments were done on a wide range of Egyptian cotton lines”
e1“No other combination was as effective when inoculated artificially”
Claim · model-written summary
In natural field attack, only mild symptoms were found in lines homozygous for B1B9K and for B4B6.
- Taxon
- cottonGossypium hirsutume0
- Gene
- B1B9K, and for B4B6e1
- Outcome
- only mild symptomse1
- Setting
- natural field attacke1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation experiments were done on a wide range of Egyptian cotton lines”
e1“in a natural field attack, only mild symptoms were found in lines homozygous for B1B9K, and for B4B6”
Claim · model-written summary
Under natural field attack, lines with B2B6 showed no symptoms.
- Taxon
- cottonGossypium hirsutume0
- Gene
- B2B6e1
- Outcome
- showed no symptomse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation experiments were done on a wide range of Egyptian cotton lines”
e1“Under the same conditions lines with B2B6 showed no symptoms”
Claim · model-written summary
Under natural field attack, lines with B2B3 were severely attacked.
- Taxon
- cottonGossypium hirsutume0
- Gene
- B2B3e1
- Outcome
- severely attackede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation experiments were done on a wide range of Egyptian cotton lines”
e1“those with B2B3 were severely attacked”